AU2003203711B2 - Facilitating interaction between video renderers and graphics device drivers - Google Patents

Description

AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION NAME OF APPLICANT(S):: Microsoft Corporation ADDRESS FOR SERVICE: DAVIES COLLISON CAVE Patent Attorneys 1 Little Collins Street, Melbourne, 3000. INVENTION TITLE: Facilitating interaction between video renderers and graphics device drivers The following statement is a full description of this invention, including the best method of performing it known to me/us: 5102 P:OPER\SPM12194300 1i spdoc-/13/2009 - lA RELATED PATENT APPLICATIONS This Application hereby incorporates by reference herein the entire disclosure of U.S. Provisional Application for Letters Patent Serial No. 60/413,060, filed September 24, 2002, and titled "Methods for Hardware Accelerating the 5 'ProcAmp' Adjustments of Video Images on a Computer Display". This Application also hereby incorporates by reference herein the entire disclosure of co-pending U.S. Provisional Application for Letters Patent Serial No. 60/376,880, filed April 15, 2002, and titled "Methods and Apparatuses for Facilitating De-Interlacing of Video Images". 10 This Application is related by subject-matter to U.S. Non-provisional Application for Letters Patent Serial No. 10/273,505, filed on October 18, 2002, and titled "Methods And Apparatuses For Facilitating Processing Of Interlaced Video Images For Progressive Video Displays", the disclosure of which is also hereby incorporated by reference herein in its entirety. 15 FIELD This disclosure relates to processing image/graphics data for display and in particular, by way of example but not limitation, to facilitating interaction between video renderers and graphics device drivers. 20 PiOPER\SPM\12194300 in padoo./13/2009 -2 BACKGROUND In a typical computing environment, a graphics card or similar is responsible for transferring images onto a display device and for handling at least part of the processing of the images. For video images, a graphics overlay device and 5 technique is often employed by the graphics card and the overall computing device. For example, to display video images from a DVD or Internet streaming source, a graphics overlay procedure is initiated to place and maintain the video images. A graphics overlay procedure selects a rectangle and a key color for establishing the screen location at which the video image is to be displayed. The 10 rectangle can be defined with a starting coordinate for a corner of the rectangle along with the desired height and width. The key color is usually a rarely seen color such as bright pink and is used to ensure that video is overlain within the defined rectangle only if the video is logically positioned at a topmost layer of a desktop on the display screen. 15 In operation, as the graphics card is providing pixel colors to a display device, it checks to determine if a given pixel location is within the selected graphics overlay rectangle. If not, the default image data is forwarded to the display device. If, on the other hand, the given pixel location is within the selected graphics overlay rectangle, the graphics card checks to determine whether the default image 20 data at that pixel is equal to the selected key color. If not, the default image data is forwarded to the display device for the given pixel. If, on the other 3 hand, the color of the given pixel is the selected key color, the graphics card forwards the video image data to the display device for that given pixel. There are, unfortunately, several drawbacks to this graphics overlay technique. First, there is usually only sufficient hardware resources for a single 5 graphics overlay procedure to be in effect at any one time. Regardless, reliance on the graphics overlay technique always results in constraints on the number of possible simultaneous video displays as limited by the hardware. Second, the pink or other key color sometimes becomes visible (i.e., is displayed on an associated display device) when the window containing the displayed video is moved 10 vigorously around the desktop on the display screen. Third, a print screen command does not function effectively inasmuch as the video image that is displayed on the display device is not captured by the print screen command. Instead, the key color is captured by the print screen command, so the printed (or copied and pasted) image includes a solid rectangle of the key 15 color where the video is displayed on the display device. Another technique for displaying video images entails using the host microprocessor to perform video adjustments prior to transferring the video image to the graphics processor for forwarding to the display device. There are also several drawbacks to this host processor technique. First, the host microprocessor 20 and associated memory subsystem of a typical computing environment is not optimized for the processing of large video images. Consequently, the size and number of video images that can be displayed are severely restricted. Second, for the host microprocessor to work efficiently, the video image must reside in memory that is directly addressable by the host microprocessor. As a result, other types of 25 hardware acceleration, such as decompression and/or de-interlacing, cannot be performed on the video image.

P:\OPER\SPMA2194300 in sp.doc4I3/2009 -4 In short, previous techniques such as the graphics overlay procedure and reliance on the host processor result in visual artifacts, are too slow and/or use memory resources inefficiently, are hardware limited, constrain video presentation flexibility, and/or do not enable a fully-functional print screen command. 5 Accordingly, there is a need for schemes and/or approaches for remedying these and other deficiencies by, inter alia, facilitating interaction between video renderers and graphics device drivers. It is desired to address or ameliorate one or more disadvantages or limitations associated with the prior art, for example as described in the above, or to 10 at least provide a useful alternative. SUMMARY In accordance with the present invention there is provided a computer implemented method for facilitating interaction between one or more video renderers and at least one graphics device driver, the method comprising: 15 querying, by a video renderer of the one or more video renderers, the at least one graphics device driver regarding process amplifier (ProcAmp) control property capabilities, the querying including a description of video to be displayed; generating, based on the description of video to be displayed, a response including information relating to ProcAmp control property capabilities; 20 sending the response to the video renderer from the at least one graphics device driver, wherein the information relating to ProcAmp control property capabilities includes at least a subset of ProcAmp control property capabilities that the at least one graphics device driver can offer to the video renderer; P:%)PER\SPN1219430O In spa.do-1312009 -5 providing to the video renderer from the graphics device driver, ProcAmp adjustments that may be performed simultaneously with video processing operations associated with the subset of ProcAmp control properties; selecting, at the video renderer, a ProcAmp control property associated with 5 one of the subset of ProcAmp control property capabilities; receiving at the graphics device driver, from the video renderer, a request for values associated with the selected ProcAmp control property; providing values to the video renderer in response to the request for values associated with the selected ProcAmp control property, the values being used in 10 video processing operations; receiving at the graphics device driver from the video renderer, a command to open a ProcAmp stream object; opening the ProcAmp stream object; sending to the video renderer, from the graphics device driver, another 15 response having a handle pointing to the opened ProcAmp stream object; receiving at the graphics device driver, from the video renderer, a command to perform a ProcAmp adjustment; and causing performance of the ProcAmp adjustment, wherein; the command includes an instruction to perform a video processing operation 20 associated with the selected ProcAmp control property concurrently with the ProcAmp adjustment; causing performance of the ProcAmp adjustment comprises causing a concurrent performance of the ProcAmp adjustment and the video processing operation; and the information relating to ProcAmp control property capabilities is directed to video processing operations that are performed simultaneously with the ProcAmp adjustments. The present invention also provides one or more electronically-accessible 5 media comprising electronically-executable instructions that, when executed, precipitate actions comprising: receiving a query at a graphics device driver from a video renderer, the query comprising: a request for information relating to process amplifier (ProcAmp) control 10 property capabilities; and a description of the type of video to be displayed; generating, based on the description of the video to be displayed, a response that includes the requested information that relates to ProcAmp control property capabilities; 15 sending the response to the video renderer from the graphics device driver; providing to the video renderer from the graphics device driver, ProcAmp adjustments that may be performed simultaneously with video processing operations associated with the ProcAmp control properties; selecting, at the video renderer, a ProcAmp control property associated with 20 one of the ProcAmp control property capabilities; receiving at the graphics device driver, from the video renderer, a request for values associated with the selected ProcAmp control property; P1OPER\5PMdI2I94300 1a spdoc-8/13/2009 - 6A providing values to the video renderer in response to the request for values associated with the selected ProcAmp control property, the values being used in video processing operations; 5 receiving at the graphics device driver from the video renderer, a command to open a ProcAmp stream object; opening the ProcAmp stream object; sending to the video renderer, from the graphics device driver, another response having a handle pointing to the opened ProcAmp stream object; 10 receiving at the graphics device driver, from the video renderer, a command to perform a ProcAmp adjustment; and causing performance of the ProcAmp adjustment, wherein; the command includes an instruction to perform a video processing operation associated with the selected ProcAmp control property concurrently with the 15 ProcAmp adjustment; causing performance of the ProcAmp adjustment comprises causing a concurrent performance of the ProcAmp adjustment and the video processing operation; and the information relating to ProcAmp control property capabilities is directed 20 to video processing operations that are performed simultaneously with the ProcAmp adjustments. The present invention also provides a system for facilitating interaction between a video renderer and a graphics device driver, the system comprising: a processor; -6B video rendering logic adapted to prepare queries that request information relating to process amplifier (ProcAmp) capabilities that can be applied to video to be displayed, wherein the queries include a description of the type of video that is to be displayed; and 5 graphics device driving logic adapted to prepare responses that indicate what ProcAmp capabilities can be applied to video to be displayed based on the description of the type of video to be displayed; and interface logic that is adapted to facilitate interaction between the video rendering logic and the graphics device driving logic, the interaction comprising: 10 receiving a query at a graphics device driver from a video renderer, the query comprising: a request for information relating to process amplifier (ProcAmp) control property capabilities; and the description of the type of video to be displayed; generating, based on the description of the video to be displayed, a response 15 that includes the requested information that relates to ProcAmp control property capabilities; sending the response to the video renderer from the graphics device driver; providing to the video renderer from the graphics device driver, ProcAmp adjustments that may be performed simultaneously with video processing 20 operations associated with the ProcAmp control properties; selecting, at the video renderer, a ProcAmp control property associated with one of the ProcAmp control property capabilities; receiving at the graphics device driver, from the video renderer, a request for values associated with the selected ProcAmp control property; PAOPERSPM\21943O 1is spadoc-/13/2009 -6C providing values to the video renderer in response to the request for values associated with the selected ProcAmp control property, the values being used in video processing operations; 5 receiving at the graphics device driver from the video renderer, a command to open a ProcAmp stream object; opening the ProcAmp stream object; sending to the video renderer, from the graphics device driver, another response having a handle pointing to the opened ProcAmp stream object; 10 receiving at the graphics device driver, from the video renderer, a command to perform a ProcAmp adjustment; and causing performance of the ProcAmp adjustment, wherein: the command includes an instruction to perform a video processing operation associated with the selected ProcAmp control property concurrently with the 15 ProcAmp adjustment; causing performance of the ProcAmp adjustment comprises causing a concurrent performance of the ProcAmp adjustment and the video processing operation; and the information relating to ProcAmp control property capabilities is directed 20 to video processing operations that are performed simultaneously with the ProcAmp adjustments. The present invention also provides one or more electronically-accessible storage media storing electronically-executable instructions that, when executed, precipitate actions comprising: - 6D transmitting a query from a video renderer to a graphics device driver, wherein the query: is directed to image processing operations that the graphics device driver is capable of providing to the video renderer; and 5 includes a description of video to be displayed; and receiving a response at the video renderer from the graphics device driver, the response indicating at least one image processing operation that the graphics device driver is capable of providing to the video renderer. The present invention also provides a computing device comprising: 10 a processor; a graphics device coupled to the processor; a computer-readable storage media, coupled to the processor, storing program modules executable by the processor, the program modules comprising: a video renderer, the video renderer configured to send a query to a graphics 15 device driver, the query being directed to image processing operations that the graphics device driver is capable of providing, wherein the query includes a description of video to be displayed; and the graphics device driver to send, to the video renderer, a response to the query, the response indicating at least one image processing operation that the 20 graphics device driver is capable of providing to the video renderer, the image processing operations including one or more video processing operations and one or more Process Amplifier (ProcAmp) adjustments. The present invention also provides a method facilitating interaction between a video renderer and a graphics device driver, the method comprising: PAU~lM5PMAlI I4JiM)151Epa.00C-V/I RZINN -6E sending a query regarding available process amplifier (ProcAmp) operations to the graphics device driver from the video renderer, wherein the query includes a description of video to be displayed; tailoring, at the graphics device driver, the ProcAmp operations of the 5 graphics device driver based on the description of video to be displayed; and transmitting a response with the tailored ProcAmp operations to the video renderer from the graphics device driver. BRIEF DESCRIPTION OF THE DRAWINGS 10 Preferred embodiments of the present invention are hereinafter described, by way of example only, with reference to the accompanying drawings, wherein: FIG. 1 is a first video processing pipeline that includes a ProcAmp adjustment operation. 15 FIG. 2 is a second video processing pipeline that includes two video processing operations to arrive at an RGB render target. FIG. 3 is a third video processing pipeline that includes one video processing operation to arrive at an RGB render target. FIG. 4 is a block diagram that illustrates certain functional elements of a 20 computing or other electronic device that is configured to facilitate i nteraction between video renderers and graphics device drivers. FIG. 5 is a communications/signaling diagram that illustrates an exemplary protocol between a video renderer and a graphics device driver.

P:\OPER\SPM ]2194300 it sa.doc4i/2009 - 6F FIG. 6 is a flow diagram that illustrates an exemplary method for facilitating interaction between a video renderer and a graphics device driver. FIG. 7 illustrates an exemplary computing (or general electronic device) operating environment that is capable of (wholly or partially) implementing at least 5 one aspect of facilitating interaction between video renderers and graphics device drivers as described herein. DETAILED DESCRIPTION Facilitating interaction between video renderers and graphics device drivers may be enabled through communication protocols and/or application programming 10 interfaces (APIs) that permit information regarding image processing capabilities of associated graphics hardware to be exchanged between a graphics device driver and a video render. Image processing capabilities include video processing capabilities; video processing capabilities include by way of example, but not limitation, process amplifier (ProcAmp) control adjustments, de-interlacing, aspect ratio corrections, 15 color space conversions, frame rate conversions, vertical or horizontal mirroring, and alpha blending. In exemplary implementations, a method facilitates interaction between one or more video renderers and at least one graphics device driver, the method including actions of: querying, by a video render of the one or more video 20 renderers, the at least one graphics device driver regarding video processing capabilities; and informing, by the at least one graphics device driver, the video render of at least a subset of video processing capabilities that the at least one graphics device driver can offer to the video renderer.

P:UPER\PMI 1 194300 ISt spadoc-/13f/009 -6G Electronically-executable instructions for a video renderer can precipitate actions including: issuing a query from a video render towards a graphics device driver, the query requesting information relating to ProcAmp capabilities; and receiving a response at the video renderer from the graphics device driver, the 5 response including the requested information relating to ProcAmp capabilities. Electronically-executable instructions thereof for a graphics device driver can precipitate actions including: receiving a query at a graphics device driver from a video renderer, the query requesting information relating to ProcAmp capabilities; and sending a response to the video renderer from the graphics device driver, the 10 response including the requested information that relates to ProcAmp capabilities. A system can facilitate interaction between a video renderer and a graphics device driver, the system including: video rendering logic that is adapted to prepare queries that request information relating to ProcAmp capabilities that can be applied to video that is to be displayed; and graphics device driving logic that is adapted to 15 prepare responses that indicate what ProcAmp capabilities can be applied to video that is to be displayed. Exemplary Video Processing Pipelines and ProcAmp Adjustments Exemplary Video Processing Pipeline with a ProcAmp Adjustment FIG. 1 is a first video processing pipeline 100 that includes a ProcAmp 20 adjustment operation 104. First video processing pipeline 100 may be implemented using graphics hardware such as a graphics card. It includes (i) three image memory blocks 102, 106, and 108 and (ii) at least one image processing operation 104. Image memory block 102 includes a YUV video image offscreen plain surface. Image processing operation 104, which comprises a ProcAmp adjustment 25 operation 104 as illustrated, is applied to image memory block 102 to produce 7 image memory block 106. Image memory block 106 includes a YUV offscreen plain surface or a YUV texture, depending on the parameters and capabilities of the graphics hardware that is performing the image adjustment operations. After one or more additional image processing operations (not explicitly 5 shown in FIG. 1), the graphics hardware produces image memory block 108, which includes an RGB render target. The RGB render target of image memory block 108 may be displayed on a display device by the graphics hardware without additional image processing operations. Also, image memory block 108 includes image data for each pixel of a screen of a display device such that no image data need be 10 retrieved from other memory during the forwarding of the image data from image memory block 108 to the display device. ProcAmp adjustment operation 104 refers to one or more process amplifier (ProcAmp) adjustments. The concept of ProcAmp adjustments originated when video was stored, manipulated, and displayed using analog techniques. However, 15 ProcAmp adjustment operations 104 may now be performed using digital techniques. Such ProcAmp adjustment operations 104 may include one or more operations that are directed to one or more of at least the following video properties: brightness, contrast, saturation, and hue. Exemplary ProcAmp-Related Video Properties 20 The following descriptions of brightness, contrast, saturation, and hue, in conjunction with possible and/or suggested settings for manipulating their values, are for an exemplary described implementation. Other ProcAmp adjustment guidelines may alternatively be employed. Brightness: Brightness is alternatively known as "Black Set"; brightness 25 should not be confused with gain (contrast). It is used to set the 'viewing black' level in each particular viewing scenario. Functionally, it adds or subtracts the 8 same number of quantizing steps (bits) from all the luminance words in a picture. It can and generally does create clipping situations if the offset plus some luminance word is less than 0 or greater than full range. It is usually interactive with the contrast control. 5 Contrast: Contrast is the 'Gain' of the picture luminance. It is used to alter the relative light to dark values in a picture. Functionally, it is a linear positive or negative gain that maps the incoming range of values into a smaller or a larger range. The set point (e.g., no change as gain changes) is normally equal to a code 0, but it is more appropriately the code word that is associated with a nominal viewing 10 black set point. The contrast gain structure is usually a linear transfer ramp that passes through this set point. Contrast functions usually involve rounding of the computed values if the gain is set is anything other than 1-to-1, and that rounding usually includes programmatic dithering to avoid visible artifact generation 'contouring'. 15 Saturation: Saturation is the logical equivalent of contrast. It is a gain function, with a set point around "zero chroma" (e.g., code 128 on YUV or code 0 on RGB in a described implementation). Hue: Hue is a phase relationship of the chrominance components. Hue is typically specified in degrees, with a valid range from -180 through +180 and a 20 default of 0 degrees. Hue in component systems (e.g., YUV or RGB) is a three part variable in which the three components change together in order to maintain valid chrominance/luminance relationships. Exemplary ProcAmp-Related Adjusting in the YUV Color Space The following descriptions for processing brightness, contrast, saturation, 25 and hue in the YUV color space, in conjunction with possible and/or suggested settings for manipulating their values, are for an exemplary described 9 implementation. Other adjustment guidelines may alternatively be employed. Generally, working in the YUV color space simplifies the calculations that are involved for ProcAmp adjustment control of a video stream. Y Processing: Sixteen (16) is subtracted from the Y values to position the 5 black level at zero. This removes the DC offset so that adjusting the contrast does not vary the black level. Because Y values may be less than 16, negative Y values should be supported at this point in the processing. Contrast is adjusted by multiplying the YUV pixel values by a constant. (If U and V are adjusted, a color shift will result whenever the contrast is changed.) The brightness property value is 10 added (or subtracted) from the contrast-adjusted Y values; this prevents a DC offset from being introduced due to contrast adjustment. Finally, the value 16 is added back to reposition the black level at 16. An exemplary equation for the processing of Y values is thus: Y'= ((Y-16) x C) + B + 16, 15 where C is the Contrast value and B is the Brightness value. UV Processing: One hundred twenty-eight (128) is first subtracted from both U and V values to position the range around zero. The hue property alone is implemented by mixing the U and V values together as follows: U'= (U-128) x Cos(H) + (V-128) x Sin(H), and 20 V' = (V-128) x Cos(H) - (U-128) x Sin(H), where H represents the desired Hue angle. Saturation is adjusted by multiplying both U and V by a constant along with the saturation value. Finally, the value 128 is added back to both U and V. The combined processing of Hue and Saturation on the UV data is thus: 25 U'= (((U-128) x Cos(H) + (V-128) x Sin(H)) x C x S) + 128, and V'= (((V-128) x Cos(H) - (U-128) x Sin(H)) x C x S) + 128, 10 where C is the Contrast value as in the Y' equation above, H is the Hue angle, and S is the Saturation. Exemplary Video Processing Pipeline with Two Processing Operations FIG. 2 is a second video processing pipeline 200 that includes two video 5 processing operations 202 and 206 to arrive at RGB render target 108. Second video processing pipeline 200 includes (i) three image memory blocks 102, 204, and 108 and (ii) two image processing operations 202 and 206. For second video processing pipeline 200 generally, image memory block 204 includes an RGB texture. Image memory block 204 results from image 10 memory block 102 after application of image processing operation 202. Image memory block 108 is produced from image memory block 204 after image processing operation 206. Other image processing operations, in addition to a ProcAmp control adjustment, may be performed. For example, any one or more of the following 15 exemplary video processing operations may be applied to video image data prior to its display on a screen of a display device: 1. ProcAmp control adjustments; 2. De-interlacing; 3. Aspect ratio correction; 20 4. Color space conversion; and 5. Vertical or horizontal mirroring and alpha blending. When possible, the desired video (and/or other image) processing operations are combined into as few operations as possible so as to reduce the overall memory bandwidth that is consumed while processing the video images. The degree to 25 which the processing operations can be combined is generally determined by the capabilities of the graphics hardware. Typically, color space conversion processing 11 and aspect ratio correction processing are applied to many, if not most, video streams. However, vertical/horizontal mirroring and alpha blending are applied less frequently. For second video processing pipeline 200, ProcAmp adjustment processing 5 and color space conversion processing are combined into image processing operation 202. Aspect ratio correction processing is performed with image processing operation 206. Optionally, vertical/horizontal mirroring and/or alpha blending may be combined into image processing operation 206. As illustrated, the graphics hardware that is implementing second video processing pipeline 200 uses 10 two image processing operations and three image memory blocks to produce image memory block 108 as the RGB render target. However, some graphics hardware may be more efficient. Exemplary Video Processing Pipeline with One Processing Operation FIG. 3 is a third video processing pipeline 300 that includes one video 15 processing operation 302 to arrive at an RGB render target 108. Generally, third video processing pipeline 300 is implemented with graphics hardware using one image processing operation 302 and two image memory blocks 102 and 108. Specifically, image memory block 108 is produced from image memory block 102 via image processing operation 302. Image processing operation 302, as illustrated, 20 includes multiple video processing operations as described below. Third video processing pipeline 300 is shorter than second video processing pipeline 200 (of FIG. 2) because image processing operation 302 combines ProcAmp adjustment processing, color space conversion processing, and aspect ratio correction processing. The number of stages in a given video processing 25 pipeline is therefore dependent on the number and types of image processing operations that are requested by software (e.g., an application, an operating system 12 component, etc.) displaying the video image as well as the capabilities of the associated graphics hardware. Exemplary software, graphics hardware, and so forth are described further below with reference to FIG. 4. Exemplary Video-Related Software and Graphics Hardware 5 FIG. 4 is a block diagram 400 that illustrates certain functional elements of a computing or other electronic device that is configured to facilitate interaction between a video renderer 410 and a graphics device driver 422. These various exemplary elements and/or functions are implementable in hardware, software, firmware, some combination thereof, and so forth. Such hardware, software, 10 firmware, some combination thereof, and so forth are jointly and separately referred to herein generically as logic. The configuration of block diagram 400 is only an example of a video data processing apparatus or system. It should be understood that one or more of the illustrated and described elements and/or functions may be combined, rearranged, 15 augmented, omitted, etc. without vitiating an ability to facilitate interaction between video renderers and graphics device drivers. Apparatus or system 400 includes transform logic 408, which, for example, may include instructions performed by a central processing unit (CPU), a graphics processing unit, and/or a combination thereof. Transform logic 408 is configured to 20 receive coded video data from at least one source 406. The coded video data from a source 406 is coded in some manner (e.g., MPEG-2, etc.), and transform logic 408 is configured to decode the coded video data. By way of example, source 406 may include a magnetic disk and related disk drive, an optical disc and related disc drive, a magnetic tape and related tape drive, 25 solid-state memory, a transmitted signal, a transmission medium, or other like source configured to deliver or otherwise provide the coded video data to transform 13 logic 408. Additional examples of source 406 are described below with reference to FIG. 7. In certain implementations, source 406 may include multiple source components such as a network source and remote source. As illustrated, source 406 includes Internet 404 and a remote disk-based storage 402. 5 The decoded video data that is output by transform logic 408 is provided to at least one video renderer 410. By way of example but not limitation, video renderer 410 may be realized using the Video Mixer and Renderer (VMR) of a Microsoft@ Windows® Operating System (OS). In a described implementation, video renderer 410 is configured to aid transform logic 408 in decoding the video 10 stream, to cause video processing operations to be performed, to blend any other auxiliary image data such as closed captions (CCs) or DVD sub-picture images with the video image, and so forth. And, at the appropriate time, video renderer 410 submits or causes submission of the video image data to graphics interface logic 412 for eventual display on a display device 436. 15 The resulting rendered video data is thus provided to graphic interface logic 412. By way of example but not limitation, graphic interface logic 412 may include, for example, DirectDraw®, Direct3D@, and/or other like logic. Graphic interface logic 412 is configured to provide an interface between video renderer 410 and a graphics device 424. As illustrated, graphics device 424 includes a graphics 20 processor unit (GPU) 426, a video memory 432, and a digital-to-analog converter (DAC) 434. By way of example but not limitation, graphics device 424 may be realized as a video graphics card that is configured within a computing or other electronic device. The image data output by graphic interface logic 412 is provided to a 25 graphics device driver 422 using a device driver interface (DDI) 414. In FIG. 3, device driver interface 414 is depicted as having at least one application 14 programming interface (API) 416 associated therewith. Device driver interface 414 is configured to support and/or establish the interface between video renderer 410 and graphics device driver 422. As illustrated at apparatus/system 400 and for a described implementation, 5 device driver interface 414 and graphics device driver 422 may further be categorized as being part of either a user mode 418 or a kernel mode 420 with respect to the associated operating system environment and graphics device 424. Hence, video renderer 410 and device driver interface 414 are part of user mode 418, and graphics device driver 422 is part of kernel mode 420. Those 10 communications occurring at least between device driver interface 414 and graphics device driver 422 cross between user mode 418 and kernel mode 420. In this described implementation, the video image data that is output by video renderer 410 is thus provided to graphics processor unit 426. Graphics processor unit 426 is configurable to perform one or more image processing 15 operations. These image processing operations include ProcAmp adjustments and/or other video processing operations as indicated by ProcAmp adjustment logic 428 and/or other video processing operations logic 430, respectively. ProcAmp adjustment operations and other exemplary video processing operations, such as de interlacing and frame rate conversion, are described further below as well as above. 20 The output from graphics processor unit 426 is provided to video memory 432. When video memory 432 is read from, the resulting image data can be forwarded to a digital-to-analog converter 434, which outputs a corresponding analog video signal that is suitable for display on and by display device 436. In other configurations, display device 436 may be capable of displaying the digital 25 image data from video memory 432 without analog conversion by a digital-to analog converter 434.

15 Exemplary Protocol between a Video Renderer and a Graphics Device Driver FIG. 5 is a communications/signaling diagram 500 that illustrates an exemplary protocol between a video renderer 410 and a graphics device driver 422. 5 The exemplary protocol facilitates the performance of video (or other image) processing operations such as a ProcAmp adjustment. Such video processing operations may include those that are requested/specified by a user activated and controlled video display application (e.g., an instigating application). Communications/signaling diagram 500 includes multiple communication 10 exchanges and communication transmissions between video renderer 410 and graphics device driver 422. Optionally, the communications may be enabled and/or aided by graphic interface 412 (of FIG. 4) and/or device driver interface 414, along with any applicable APIs 416 thereof. A communications exchange 502 is directed to establishing video processing 15 (VP) capabilities. Specifically, video renderer 410 requests or queries at transmission 502A graphics device driver 422 regarding video processing capabilities that are possessed by and that are to be provided by graphics device driver 422. In response 502B, graphics device driver 422 informs video renderer 410 of the allotted video processing capabilities. 20 The allotted video processing capabilities include those video processing operations that graphics device driver 422 is capable of performing. These may include one or more of ProcAmp control adjustment operations, de-interlacing operations, aspect ratio correction operations, color space conversion operations, vertical/horizontal mirroring and alpha blending, frame rate conversion operations, 25 and so forth. Graphics device driver 422 may choose to provide all or a portion of the remaining video processing operational bandwidth. By allotting less than all of 16 the remaining video processing operations bandwidth, graphics device driver 422 is able to hold in reserve additional video processing operations bandwidth for subsequent requests. A communications exchange 504 is directed to establishing control property 5 capabilities for a specified video processing operation. In a request 504A that is sent from video renderer 410 to graphics device driver 422, video renderer 410 specifies a particular video processing operation allotted in response 502B. Request 504A may also include an inquiry as to what or which property capabilities graphics device driver 422 is able to perform with respect to the particular video 10 processing operation. In a response 504B, graphics device driver 422 informs video renderer 410 as to the property capabilities that are available for the specified particular video processing operation. Communications exchange 504 may be omitted if, for example, there are not multiple control property capabilities for the particular video processing operation. 15 A communications exchange 506 is directed to establishing which of the other allotted video processing operations may be performed simultaneously with the particular video processing operation as specified. In a request 506A, video renderer 410 issues a query to graphics device driver 422 to determine which video processing operations, if any, may be performed simultaneously with the particular 20 video processing operation. Graphics device driver 422 informs video renderer 410 in response 506B of the video processing operations that is possible for graphics device driver 422 to perform simultaneously with the particular video processing operation. By way of example, it should be noted that (i) transmissions 504A and 506A and/or (ii) transmissions 504B and 506B may be combined into single query 25 and response transmissions, respectively.

17 A communications exchange 508 is directed to establishing values for a specified control property of the particular video processing operation. In a request 508A, video renderer 410 specifies in an inquiry a control property for the particular video processing operation. The specified control property may be 5 selected from the available control properties provided in response 504B. Graphics device driver 422 provides values that are related to the specified control property for the particular video processing operation to video renderer 410. These values may be numerical set points, ranges, etc. that video renderer 410 can utilize as a framework when instructing graphics device driver 422 to perform the particular 10 video processing operation. Communications exchange 508 may be repeated for each available control property that is indicated in response 504B. Alternatively, one such communication exchange 508 may be directed to multiple (including all of the) control properties of the available control properties. A communications exchange 510 is directed to initiating a video processing 15 stream object. In an instruction 510A, video renderer 410 sends a command to graphics device driver 422 to open a video processing stream object. This command may be transmitted on behalf of an application or other software component that is trying to present video images on display device 436. In a response 51 OB, graphics device driver 422 returns a handle for the video processing 20 stream object to the requesting video renderer 410. In a transmission 512A, video renderer 410 instructs graphics device driver 422 to perform the particular or another allotted video processing operation. The perform video processing operation command may include selected numerals to set and/or change values for one or more control properties for the particular video 25 processing operation. In response, graphics device driver 422 performs a video processing operation 512B as requested in transmission 512A. Typically, at least 18 one video renderer 410 is assigned to each application that is to be displaying video. Whenever such an instigating application requests a video processing operation, for example, video renderer 410 forwards such request as a video processing operation instruction, optionally after re-formatting, translation, and so forth, to graphics 5 device driver 422. Perform video processing operation commands 512A and resulting video processing operations 512B may be repeated as desired while the video processing stream object is extant. When the video is completed or the relevant software is terminated, a close video processing stream object instruction 514 is transmitted 10 from video renderer 410 to graphics device driver 422. The approaches of FIGS. 4, 5, and 6, for example, are illustrated in diagrams that are divided into multiple blocks and/or multiple transmissions. However, the order and/or layout in which the approaches are described and/or shown is not intended to be construed as a limitation, and any number of the 15 blocks/transmissions can be combined and/or re-arranged in any order to implement one or more systems, methods, media, protocols, arrangements, etc. for facilitating interaction between video renderers and graphics device drivers. Furthermore, although the description herein includes references to specific implementations such as that of FIG. 4 (as well as the exemplary system environment of FIG. 7) and 20 to exemplary APIs, the approaches can be implemented in any suitable hardware, software, firmware, or combination thereof and using any suitable programming language(s), coding mechanism(s), protocol paradigm(s), graphics setup(s), and so forth. Exemplary General API Implementation 25 FIG. 6 is a flow diagram 600 that illustrates an exemplary method for facilitating interaction between a video renderer 410 and a graphics device driver 19 422. Although a described implementation as reflected by FIG. 6 is directed to a ProcAmp adjustment operation, it is not so limited. Instead, at least certain aspects of this exemplary general API implementation may be used with one or more other video (or general image) processing operations. 5 In flow diagram 600, video renderer -410 is associated with nine (9) blocks 602-618, and graphics device driver 422 is associated with six (6) blocks 620-630. Each of blocks 602-618 and 620-630 corresponds to at least one action that is performed by or on behalf of video renderer 410 and graphics device driver 422, respectively. 10 Flow diagram 600 is described below in the context of exemplary general APIs. These general APIs as described herein can be divided into two functional groups of methods, apparatus logic, etc. The first group can be used to determine the video processing capabilities of a graphics device. The second group can be used to create and use video processing operation stream objects. 15 These exemplary general APIs may correspond to APIs 416 (of FIG. 4) that are illustrated as being part of device driver interface 414, which supports graphic interface 412 and interfaces with graphics device driver 422. APIs 416 are thus illustrated as being part of device driver interface 414 that is in user mode portion 418. However, such APIs 416 may alternatively be located at and/or functioning 20 with other logic besides device driver interface 414. Such other logic includes, by way of example only, video renderer 410, graphic interface 412, some part of kernel mode portion 420, and so forth. The general APIs described below in this section may be used to extend/enhance/etc. Microsoft@ DirectX@ Video Acceleration (VA), for example, 25 so as to support any of a number of video processing operations (e.g., ProcAmp adjustments, frame rate conversions, etc.) for video content being displayed in 20 conjunction with a graphics device driver. Additional related information can be found in a Microsoft@ Windows® Platform Design Note entitled "DirectX@ VA: Video Acceleration API/DDI", dated January 23, 2001. "DirectX@ VA: Video Acceleration API/DDI" is hereby incorporated by reference in its entirety herein. 5 Although the actions of flow diagram 600 are described herein in terms of APIs that are particularly applicable to the current evolution of Microsoft® Windows@ operating systems for personal computers, it should be understood that the blocks thereof, as well as the other implementations described herein, are also applicable to other operating systems and/or other electronic devices. 10 In the following examples, the output of the video processing operation(s) is provided in an RGB render target format such as a target DirectDraw® surface. Doing so precludes the need for conventional hardware overlay techniques. Additionally, an entire screen as viewable on a display device, including any video images, exists and, furthermore, is present in one memory location so that it can be 15 captured by a print screen command. This print screen capture can then be pasted into a document, added to a file, printed directly, and so forth. In flow diagram 600, video renderer 410 may have already been informed by graphics device driver 422 that associated graphics hardware is capable of performing ProcAmp adjustment video processing operations or video renderer 410 20 may determine the existence of ProcAmp capabilities, or the lack thereof, as follows. At block 602, video renderer 410 provides a description of the video to be displayed and requests graphics processing capabilities with respect to ProcAmp control properties. Video renderer 410 makes the video description provision and/or the control 25 properties request to graphics device driver 422 via one or more transmissions as indicated by the transmission arrow between block 602 and block 620. The 21 description of the video enables graphics device driver 422 to tailor the available/possible/etc. video processing capabilities based on the type of video. For example, a predetermined set of capabilities may be set up for each of several different types of video. 5 At block 620, graphics device driver 422 provides video renderer 410 a listing of the available ProcAmp control properties. This list may include none or one or more of brightness, contrast, hue, and saturation. At block 604, video renderer 410 receives the available ProcAmp control properties from graphics device driver 422. Actions of blocks 620 and 622 may be performed responsive to 10 the communication(s) of block 602. Alternatively, video renderer 410 may make a separate inquiry to elicit the actions of block 622. At block 622, graphics device driver 422 provides video renderer 410 with those video processing operations that may possibly be performed simultaneously/concurrently with ProcAmp adjustment operations. Such video 15 processing operations may include none or one or more of YUV2RGB, StretchX, StretchY, SubRects, and AlphaBlend. Other such video processing operations may include de-interlacing, frame rate conversion, and so forth. At block 606, video renderer 410 receives the possible simultaneous video processing operations from graphics device driver 422. 20 An exemplary general API for implementing at least part of the actions of blocks 602, 604, 606, 620, and 622 is provided as follows: ProcAmpControlQueryCaps This API enables video renderer 410 to query graphics device driver 422 to determine the information related to the input requirements of a 25 ProcAmp control device and any additional video processing operations that 22 might be supported at the same time as ProcAmp adjustment operations are being performed. HRESULT 5 ProcAmpControlQueryCaps( [in] DXVAVideoDesc* lpVideoDescription, [out] DXVAProcAmpControlCaps* lpProcAmpCaps 10 Graphics device driver 422 reports its capabilities for that mode in an output DXVAProcAmpControlCaps structure for lpProcAmpCaps. typedef struct _DXVAProcAmpControlCaps { DWORD Size; 15 DWORD InputPool; D3DFORMAT OutputFrameFormat; DWORD ProcAmpControlProps; DWORD VideoProcessingCaps; } DXVAProcAmpControlCaps; 20 The Size field indicates the size of the data structure and may be used, inter alia, as a version indicator if different versions have different data structure sizes. The InputPool field indicates a memory pool from which the video 25 source surfaces are to be allocated. For example, the memory pool may be located at local video memory on the graphics card, at specially-tagged system memory (e.g., accelerated graphics port (AGP) memory), general 23 system memory, and so forth. The D3D and DirectDraw documentations also provide a description of valid memory pool locations. The OutputFrameFormat field indicates a Direct3D surface format of the output frames. The ProcAmp device can output frames in a surface 5 format that matches the input surface format. This field ensures that video renderer 410 will be able to supply the correct format for the output frame surfaces to the ProcAmp control hardware. Note that if the DXVAVideoProcessYUV2RGB flag (see below) is returned in the VideoProcessingCaps field, video renderer 410 can assume that valid output 10 formats are specified by this field as well as an RGB format such as RGB32. RGB32 is an RGB format with 8 bits of precision for each of the Red, Green, and Blue channels and 8 bits of unused data. The ProcAmpControlProp field identifies the ProcAmp operations that the hardware is able to perform. Graphics device driver 422 returns the 15 logical of the combination of the ProcAmp operations that it supports: - DXVAProcAmpNone. The hardware does not support any ProcAmp control operations. - DXVAProcAmpBrightness. The ProcAmp control hardware can perform brightness adjustments to the video image. 20 0 DXVAProcAmpContrast. The ProcAmp control hardware can perform contrast adjustments to the video image. - DXVAProcAmpHue. The ProcAmp control hardware can perform hue adjustments to the video image. - DXVAProcAmpSaturation. The ProcAmp control 25 hardware can perform saturation adjustments to the video image.

24 The VideoProcessingCaps field identifies other operations that can be performed concurrently with a requested ProcAmp adjustment. The following flags identify the possible operations: - DXVAVideoProcessYUV2RGB. The ProcAmp control 5 hardware can convert the video from the YUV color space to the RGB color space. The RGB format used can have 8 bits or more of precision for each color component. If this is possible, a buffer copy within video renderer 410 can be avoided. Note that there is no requirement with respect to this flag to convert from the RGB color 10 space to the YUV color space. - DXVAVideoProcessStretchX. If the ProcAmp control hardware is able to stretch or shrink horizontally, aspect ratio correction can be performed at the same time as the video is being ProcAmp adjusted. 15 * DXVAVideoProcessStretchY. Sometimes aspect ratio adjustment is combined with a general picture re-sizing operation to scale the video image within an application-defined composition space. This is a somewhat rare feature. Performing the scaling for resizing the video to fit into the application window can be done at 20 the same time as the scaling for the ProcAmp adjustment. Performing these scalings together avoids cumulative artifacts. - DXVA VideoProcessSubRects. This flag indicates that hardware is able to operate on a rectangular (sub-)region of the image as well as the entire image. The rectangular region can be identified 25 by a source rectangle in a DXVA_ProcAmpControlBlt data structure.

25 DXVAVideoProcessAlphaBlend. Alpha blending can control how other graphics information is displayed, such as by setting levels of transparency and/or opacity. Thus, an alpha value can indicate the transparency of a color - or the extent to which the 5 color is blended with any background color. Such alpha values can range from a fully transparent color to a fully opaque color. In operation, alpha blending can be accomplished using a pixel-by-pixel blending of source and background color data. Each of the three color components (red, green, and blue) of a given source 10 color may be blended with the corresponding component of the background color to execute an alpha blending operation. In an exemplary implementation, color may be generally represented by a 32-bit value with 8 bits each for alpha, red, green, and blue. Again, using this feature can avoid a buffer copy with video 15 renderer 410. However, this is also a rarely used feature because applications seldom alter the constant alpha value associated with their video stream. At block 608 of flow diagram 600, video renderer 410 selects a ProcAmp control property from those received at block 604. At block 610, video renderer 20 410 requests one or more values for the selected ProcAmp control property from graphics device driver 422. At block 624, graphics device driver 422 sends to video renderer 410 values for the requested ProcAmp control property. Such values may relate to one or more of a default value, an increment value, a minimum value, a maximum value, and so forth. 25 At block 612, video renderer 410 receives from graphics device driver 422, and is thus informed of, one or more values for the selected ProcAmp control 26 property. As indicated by the flow arrow from block 612 to block 608, the actions of blocks 608, 610, 612, and 624 may be repeated for more than one including all of the available ProcAmp control properties. Alternatively, video renderer 410 may query graphics device driver 422 for more than one including all of the available 5 ProcAmp control properties in a single communication exchange having two or more transmissions. An exemplary general API for implementing at least part of the actions of blocks 608, 610, 612, and 624 is provided as follows: ProcAmpControlQueryRange 10 For each ProcAmp property (brightness, contrast, saturation, hue, etc.), video renderer 410 queries graphics device driver 422 to determine the minimum, maximum, step size (increment), default value, and so forth. If the hardware does not support a particular ProcAmp control property, graphics device driver 422 may return "ENOTIMPL" in response to the 15 ProcAmpControlQueryRange function. Although graphics device driver 422 can return any values it wishes for the different ProcAmp control properties, the following settings values are provided by way of example (all tabulated values are floats): 20 Property Mini Maxim Def Incre y mum um ault ment Brightn - 100.0F 0.0 0.1F ess 100.OF F 27 Contras 0.OF 10.0F 1.0 0.01F t F Saturati 0.OF 10.0F 1.0 0.01F on F Hue 180.OF 0.0 0.1F 180.OF F If the default values result in a null transform of the video stream, video renderer 410 is allowed to bypass the ProcAmp adjustment stage in its video pipeline if the instigating application does not alter any of the 5 ProcAmp control properties. HRESULT ProcAmpControlQueryRange( [in] DWORD VideoProperty, 10 [in] DXVAVideoDesc* lpVideoDescription, [out] DXVAVideoPropertyRange* lpPropRange VideoProperty identifies the ProcAmp control property (or properties) 15 that graphics device driver 422 has been requested to return information for. In a described implementation, possible parameter values for this field are: - DXVAProcAmpBrightness; - DXVAProcAmpContrast; - DXVAProcAmp Hue; and 20 - DXVAProcAmpSaturation.

28 lpVideoDescription provides -graphics device driver 422 with a description of the video that the ProcAmp adjustment is going to be applied to. Graphics device driver 422 may adjust its ProcAmp feature support for particular video stream description types. 5 IpPropRange identifies the range (min and max), step size, and default value for the ProcAmp control property that is specified by the VideoProperty parameter/field. typedef struct _DXVAVideoPropertyRange { 10 FLOAT MinValue; FLOAT MaxValue; FLOAT DefaultValue; FLOAT StepSize; }DXVAVideoPropertyRange, *LPDXVAVideoPropertyRange; 15 At block 614 of flow diagram 600, video renderer 410 sends an open ProcAmp stream object command to graphics device driver 422. In response, graphics device driver 422 opens a ProcAmp stream object at block 626. At block 616, video renderer 410 instructs graphics device driver 422 to perform a ProcAmp 20 adjustment operation. In response, graphics device driver 422 performs the requested ProcAmp adjustment operation at block 628. As indicated by the curved flow arrow at block 616, video renderer 410 may continue to send perform ProcAmp adjustment operation instructions to graphics device driver 422 as long as desired (e.g., whenever required by an instigating 25 application displaying the video stream). At block 618, video renderer 410 instructs 29 graphics device driver 422 to close the ProcAmp stream object. Graphics device driver 422 then closes the ProcAmp stream object at block 630. An exemplary general API for implementing at least part of the actions of blocks 614, 616, 618, 626, 628, and 630 is provided as follows: 5 The ProcAmpStream Object After video renderer 410 has determined the capabilities of the ProcAmp control hardware, a ProcAmpStream object can be created. Creation of a ProcAmpStream object allows graphics device driver 422 to reserve any hardware resources that are required to perform requested 10 ProcAmp adjustment operation(s). ProcAmpOpenStream The ProcAmpOpenStream method creates a ProcAmpStream object. HRESULT 15 ProcAmpOpenStream( [in] LPDXVAVideoDesc lpVideoDescription, [out] HDXVAProcAmpStream* lphCcStrm 20 The HDXVAProcAmpStream output parameter is a handle to the ProcAmpStream object and is used to identify this stream in future calls that are directed thereto. ProcAmpBlt The ProcAmpBlt method performs the ProcAmp adjustment operation 25 by writing the output to the destination surface during a bit block transfer operation.

30 RESULT ProcAmpBlt( [in] HDXVAProcAmpStream hCcStrm 5 [in] LPDDSURFACE lpDDSDstSurface, [in] LPDDSURFACE lpDDSSrcSurface, [in] DXVAProcAmpBlt* ccBlt 10 The source and destination rectangles are used for either sub rectangle ProcAmp adjustment or stretching. Support for stretching is optional (and is reported by Caps flags). Likewise, support for sub rectangles is not mandatory. The destination surface can be an off-screen plain, a D3D render 15 target, a D3D texture, a D3D texture that is also a render target, and so forth. The destination surface may be allocated in local video memory, for example. The pixel format of the destination surface is the one indicated in the DXVAProcAmpCaps structure unless a YUV-to-RGB color space conversion is being performed along with the ProcAmp adjustment 20 operation. In these cases, the destination surface format is an RGB format with 8 bits or more of precision for each color component. ProcAmpCloseStream The ProcAmpCloseStream method closes the ProcAmpStream object and instructs graphics device driver 422 to release any hardware resource 25 associated with the identified stream.

RESULT

31 ProcAmpCloseStream( HDXVAProcAmpStream hCcStrm 5 Exemplary Specific API Implementation The particular situation and exemplary APIs described below in this section are specifically applicable to a subset of existing Microsoft@ Windows® operating systems for personal computers. However, it should nevertheless be understood that the principles, as well as certain aspects of the pseudo code, that are presented 10 below may be utilized (as is or with routine modifications) in conjunction with other operating systems and/or other environments. DDI Mapping for a ProcAmp Interface For compatibility with the DDI infrastructure for a subset of existing Microsoft@ Windows® operating systems, the API described above in the previous 15 section can be "mapped" to the existing DDI for DirectDraw and DirectX VA. This section describes a ProcAmp interface mapping to the existing DirectDraw and DX VA DDI. The DX-VA DDI is itself split into two functional groups: the "DX-VA container" and the "DX-VA device." The purpose of the DX-VA container DDI 20 group is to determine the number and capabilities of the various DX-VA devices contained by the display hardware. Therefore, a DX-VA driver can only have a single container, but it can support multiple DX-VA devices. It is not feasible to map the ProcAnipQueryCaps call on to any of the DDI entry points in the DX-VA container group because, unlike the rest of DX-VA, the 25 container methods use typed parameters. However, the DX-VA device DDI group does not use typed parameters, so it is feasible to map the ProcAmp control 32 interface to the methods in the device group. This section describes a specific example of how the ProcAmp interface can be mapped to the DX-VA device DDI. De-interlace Container Device The DX-VA device methods do not use typed parameters, so these methods 5 can be reused for many different purposes. However, the DX-VA device methods can only be used in the context of a DX-VA device, so a first task is to define and create a special "container device." U.S. Non-provisional Application for Letters Patent Serial No. 10/273,505, which is titled "Methods And Apparatuses For Facilitating Processing Of Interlaced 10 Video Images For Progressive Video Displays" and which is incorporated by reference herein above, includes description of a de-interlace container device. That Application's described de-interlace container device is re-used here for the ProcAmpQueryCaps function. The DX-VA de-interlace container device is a software construct only, so it 15 does not represent any functional hardware contained on a physical device. The ProcAmp control sample (device) driver pseudo code presented below indicates how the container device can be implemented by a driver. Calling the DDI from a User-Mode Component An exemplary sequence of eight (8) tasks to use the DDI from a user-mode 20 component such as a (video) renderer is as follows: 1. Call GetMoCompGuids to get the list of DX-VA devices supported by the driver. 2. If the "de-interlace container device" GUID is present, call CreateMoComp to create an instance of this DX-VA device. The container device 25 GUID is defined as follows: 33 DEFINEGUID(DXVADeinterlaceContainerDevice, Ox0e85cb93,0x3046,Ox4ff0,Oxae,Oxcc,Oxd5,Ox8c,Oxb5,Oxf0, Ox35,Oxfc); 3. Call RenderMocomp with a dwFunction parameter that identifies a 5 ProcAmpControlQueryModeCaps operation. Again, the lplnputData parameter is used to pass the input parameters to the driver, which returns its output through the lpOutputData parameter. 4. For each ProcAmp adjustment property supported by the hardware the renderer calls RenderMocomp with a dwFunction parameter that identifies a 10 ProcAmpControlQueryRange operation. The lplnputData parameter is used to pass the input parameters to the driver, which returns its output through the lpOutputData parameter. 5. After the renderer has determined the ProcAmp adjustment capabilities of the hardware, it calls CreateMocomp to create an instance of the 15 ProcAmp control device. The ProcAmp control device GUID is defined as follows: DEFINEGUID(DXVAProcAmpControlDevice, Ox9f200913,Ox2ffd,0x4056,Ox9f,Oxle,Oxel,Oxb5,0x08,Oxf2,Ox2d,Oxcf); 20 6. The renderer then calls the ProcAmp control device's RenderMocomp with a function parameter of DXVAProcAmpControlBltFnCode for each ProcAmp adjusting operation. 7. When the renderer no longer needs to perform any more ProcAmp operations, it calls DestroyMocomp. 25 8. The driver releases any resources used by the ProcAmp control device.

34 ProcAmpControlQueryCaps This method maps directly to a call to the RenderMoComp method of the de-interlace container device. The DDRENDERMOCOMPDATA structure is completed as follows: 5 - dwNumBuffers is zero. - lpBufferInfo is NULL. - dwFunction is defined as DXVAProcAmpControlQueryCapsFnCode. - lpInputData points to a DXVAVideoDesc structure. 10 * lpOutputData points to a DXVAProcAmpCaps structure. Note that the DX-VA container device's RenderMoComp method can be called without BeginMoCompFrame or EndMoCompFrame being called first. ProcAmpControlQueryRange 15 This method maps directly to a call to the RenderMoComp method of the de-interlace container device. The DDRENDERMOCOMPDATA structure is completed as follows: - dwNumBuffers is zero. - lpBufferlnfo is NULL. 20 * dwFunction is defined as DXVAProcAmpControlQueryRangeFnCode. - lpInputData points to a DXVAProcAmpControlQueryRange structure. 25 typedef struct _DXVAProcAmpQueryRange { DWORD Size; 35 DWORD VideoProperty; DXVAVideoDesc VideoDesc; } DXVAProcAmpControlQueryRange, *LPDXVAProcAmpControlQueryRange; 5 lpOutputData will point to a DXVAVideoPropertyRange structure. Note that the DX-VA container device's RenderMoComp method can be called without BeginMoCompFrame or EndMoCompFrame being called 10 first. ProcAmpControlOpenStream This method maps directly to a CreateMoComp method of the DDMOTIONCOMPCALLBACKS structure, where the GUID is the ProcAmp Device GUID, pUncompData points to a structure that contains no 15 data (all zeros), and pData points to a DXVAVideoDesc structure. If a driver supports accelerated decoding of compressed video, the renderer can call the driver to create two DX-VA devices -- one to perform the actual video decoding work as defined by the DirectX VA Video Decoding specification and another to be used strictly for ProcAmp 20 adjustments. **Example: Mapping CreateMoComp to ProcAmpControlOpenStream** The exemplary pseudo code below shows how a driver can map the CreateMoComp DDI call into calls to ProcAmpControlOpenStream. The pseudo code shows how the CreateMocComp function is used for ProcAmp. 25 If a driver supports other DX-VA functions such as decoding MPEG-2 video 36 streams, the sample code below can be extended to include processing of additional DX-VA GUIDs. DWORD APIENTRY 5 CreateMoComp( LPDDHALCREATEMOCOMPDATA lpData ) { // Make sure its a guid we like. 10 if (!ValidDXVAGuid(lpData->lpGuid)) { DbgLog((LOGERROR, 1, TEXT("No formats supported for this GUID"))); 15 lpData->ddRVal = EINVALIDARG; return DDHALDRIVERHANDLED; } // Look for the deinterlace container device GUID 20 if (*lpData->lpGuid == DXVADeinterlaceContainerDevice) { DXVADeinterlaceContainerDeviceClass* lpDev new DXVADeinterlaceContainerDeviceClass( *lpData->lpGuid, 25 DXVADeviceContainer); if (lpDev) { lpData->ddRVal = DDOK;

}

37 else { lpData->ddRVal = EOUTOFMEMORY; } 5 lpData->lpMoComp->IpDriverReserved1 = (LPVOID)(DXVADeviceBaseClass*)lpDev; return DDHALDRIVERHANDLED; } 10 // Look for the ProcAmp Control device GUID if (*1pData->lpGuid == DXVAProcAmpControlDevice) { DXVAProcAmpControlDeviceClass* lpDev = new DXVAProcAmpControlDeviceClass( 15 *1pData->lpGuid, DXVADeviceProcAmpControl); if (lpDev) { LPDXVAVideoDesc lpVideoDescription 20 (LPDXVAVideoDesc)lpData->lpData; lpData->ddRVal = lpDev->ProcAmpControlOpenStream( lpVideoDescription); 25 if (lpData->ddRVal != DDOK) { delete lpDev; lpDev = NULL; } 30 else { 38 lpData->ddRVal = EOUTOFMEMORY; } lpData->lpMoComp->lpDriverReserved1 = 5 (LPVOID)(DXVADeviceBaseClass*)lpDev; return DDHALDRIVERHANDLED; } lpData->ddRVal = DDERRCURRENTLYNOTAVAIL; return DDHALDRIVERHANDLED; 10 } **Example: Implementing GetMoCompGuids** In addition to the CreateMoComp DDI function, a driver can also be capable of implementing the GetMoCompGuids method of the 15 DDMOTIONCOMPCALLBACKS structure. The following exemplary pseudo code shows one manner of implementing this function in a driver. // This is a list of DV-VA device GUIDs supported by / the driver - this list includes decoder, ProcAmp and 20 -/the de-interlacing container device. There is no significance to /the order of the GUIDs on the list. DWORD g dwDXVANumSupportedGUIDs =2; const GUID* gDXVASupportedGUIDs[2]= { &DXVADeinterlaceContainerDevice, 25 &DXVAProcAmpControlDevice }; DWORD APIENTRY GetMoCompGuids( 39 PDDGETMOCOMPGUIDSDATA lpData ) { DWORD dwNumToCopy; 5 // Check to see if this is a GUID request or a count request if (lpData->lpGuids) { dwNumToCopy = min(gdwDXVANumSupportedGUIDs, 10 lpData->dwNumGuids); for (DWORD i = 0; i < dwNumToCopy; i++) { lpData->lpGuids[i]= *g_DXVASupportedGUIDs[i]; } 15 } else { dwNumToCopy = gdwDXVANumSupportedGUIDs; } 20 lpData->dwNumGuids = dwNumToCopy; lpData->ddRVal = DD_OK; return DDHALDRIVERHANDLED; } 25 ProcAmpControlBlt This method maps directly to a RenderMoComp method of the DDMOTIONCOMPCALLBACKS structure, where: - dwNumBuffers is two.

40 - lpBufferlnfo points to an array of two surfaces. The first element of the array is the destination surface; the second element of the array is the source surface. - dwFunction is defined as 5 DXVAProcAmpControlBltFnCode. - lpInputData points to the following structure: typedef struct _DXVAProcAmpControlBlt { DWORD Size; 10 RECT DstRect; RECT SrcRect; FLOAT Alpha; FLOAT Brightness; FLOAT Contrast; 15 FLOAT Hue; FLOAT Saturation; }DXVAProcAmpControlBlt; - lpOutputData is NULL. 20 Note that for the DX-VA device used for ProcAmp, RenderMoComp can be called without calling BeginMoCompFrame or EndMoCompFrame. **Example: Mapping RenderMoComp to ProcAmpControlBlt** The exemplary pseudo code below shows how a driver can map the RenderMoComp DDI call into calls to ProcAmpBlt. The sample code shows 25 how the RenderMoComp function is used for ProcAmp adjustment. If the driver supports other DX-VA functions such as decoding MPEG-2 video 41 streams, the sample code below can be extended to include processing of additional DX-VA GUIDs. DWORD APIENTRY 5 RenderMoComp( LPDDHALRENDERMOCOMPDATA lpData ) { if (lpData->dwFunction == DXVAProcAmpControlBItFnCode) 10 { DXVAProcAmpControlDeviceClass* pDXVADev = (DXVAProcAmpControlDeviceClass*)pDXVABase; DXVAProcAmpControlBlt* lpBlt = 15 (DXVAProcAmpControlBlt*)lpData->lpInputData; LPDDMCBUFFER[NFO lpBufflnfo = lpData->lpBufferlnfo; lpData->ddRVal = pDXVADev->ProcAmpControlBlt( 20 lpBuffinfo[O].lpCompSurface, 1pBufflnfo[ 1].lpCompSurface, lpBlt); return DDHALDRIVERHANDLED; } 25 lpData->ddRVal = EINVALIDARG; return DDHALDRIVERHANDLED; } ProcAmpControlCloseStream 42 This method maps directly to a DestroyMoComp method of the DDMOTIONCOMPCALLBACKS structure. **Example: Mapping DestroyMoComp to ProcAmpControlCloseStream** The following exemplary pseudo code shows how a driver can map 5 the DestroyMoComp DDI call into calls to ProcAmpControlCloseStream. The sample code shows how the DestroyMoComp function is used for ProcAmp control. If the driver supports other DX-VA functions such as decoding MPEG-2 video streams, the sample code below can be extended to include processing of additional DX-VA GUIDs. 10 DWORD APIENTRY DestroyMoComp( LPDDHALDESTROYMOCOMPDATA lpData ) 15 { DXVADeviceBaseClass* pDXVABase = (DXVADeviceBaseClass*) lpData->lpMoComp->lpDriverReservedl; 20 if (pDXVABase == NULL) { lpData->ddRVal = EPOINTER; return DDHALDRIVERHANDLED; } 25 switch (pDXVABase->mDeviceType) { case DXVADeviceContainer: lpData->ddRVal = S_OK; delete pDXVABase; 43 break; case DXVADeviceProcAmpControl: { 5 DXVA_ProcAmpControlDeviceClass* pDXVADev = (DXVAProcAmpControlDeviceClass *)pDXVAase; lpData->ddRVal = pDXVADev >ProcAmpControlCloseStreamo; delete pDXVADev; 10 } break; } return DDHALDRIVERHANDLED; } 15 Exemplary Operating Environment for Computer or Other Electronic Device FIG. 7 illustrates an exemplary computing (or general electronic device) operating environment 700 that is capable of (fully or partially) implementing at least one system, device, component, arrangement, protocol, approach, method, 20 process, some combination thereof, etc. for facilitating interaction between video renderers and graphics device drivers as described herein. Computing environment 700 may be utilized in the computer and network architectures described below or in a stand-alone situation. Exemplary electronic device operating environment 700 is only one example 25 of an environment and is not intended to suggest any limitation as to the scope of use or functionality of the applicable electronic (including computer, game console, television, etc.) architectures. Neither should electronic device environment 700 be 44 interpreted as having any dependency or requirement relating to any one or to any combination of components as illustrated in FIG. 7. Additionally, facilitating interaction between video renderers and graphics device drivers may be implemented with numerous other general purpose or special 5 purpose electronic device (including computing system) environments or configurations. Examples of well known electronic (device) systems, environments, and/or configurations that may be suitable for use include, but are not limited to, personal computers, server computers, thin clients, thick clients, personal digital assistants (PDAs) or mobile telephones, hand-held or laptop 10 devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics, video game machines, game consoles, portable or handheld gaming units, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, some combination thereof, and so forth. 15 Implementations for facilitating interaction between video renderers and graphics device drivers may be described in the general context of electronically executable instructions. Generally, electronically-executable instructions include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Facilitating interaction between 20 video renderers and graphics device drivers, as described in certain implementations herein, may also be practiced in distributed computing environments where tasks are performed by remotely-linked processing devices that are connected through a communications link and/or network. Especially in a distributed computing environment, electronically-executable instructions may be 25 located in separate storage media, executed by different processors, and/or propagated over transmission media.

45 Electronic device environment 700 includes a general-purpose computing device in the form of a computer 702, which may comprise any electronic device with computing and/or processing capabilities. The components of computer 702 may include, but are not limited to, one or more processors or processing units 704, 5 a system memory 706, and a system bus 708 that couples various system components including processor 704 to system memory 706. System bus 708 represents one or more of any of several types of wired or wireless bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety 10 of bus architectures. By way of example, such architectures may include an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, an Enhanced ISA (EISA) bus, a Video Electronics Standards Association (VESA) local bus, a Peripheral Component Interconnects (PCI) bus also known as a Mezzanine bus, some combination thereof, and so forth. 15 Computer 702 typically includes a variety of electronically-accessible media. Such media may be any available media that is accessible by computer 702 or another electronic device, and it includes both volatile and non-volatile media, removable and non-removable media, and storage and transmission media. System memory 706 includes electronically-accessible storage media in the 20 form of volatile memory, such as random access memory (RAM) 710, and/or non volatile memory, such as read only memory (ROM) 712. A basic input/output system (BIOS) 714, containing the basic routines that help to transfer information between elements within computer 702, such as during start-up, is typically stored in ROM 712. RAM 710 typically contains data and/or program 25 modules/instructions that are immediately accessible to and/or being presently operated on by processing unit 704.

46 Computer 702 may also include other removable/non-removable and/or volatile/non-volatile storage media. By way of example, FIG. 7 illustrates a hard disk drive or disk drive array 716 for reading from and writing to a (typically) non removable, non-volatile magnetic media (not separately shown); a magnetic disk 5 drive 718 for reading from and writing to a (typically) removable, non-volatile magnetic disk 720 (e.g., a "floppy disk"); and an optical disk drive 722 for reading from and/or writing to a (typically) removable, non-volatile optical disk 724 such as a CD-ROM, DVD, or other optical media. Hard disk drive 716, magnetic disk drive 718, and optical disk drive 722 are each connected to system bus 708 by one 10 or more storage media interfaces 726. Alternatively, hard disk drive 716, magnetic disk drive 718, and optical disk drive 722 may be connected to system bus 708 by one or more other separate or combined interfaces (not shown). The disk drives and their associated electronically-accessible media provide non-volatile storage of electronically-executable instructions, such as data 15 structures, program modules, and other data for computer 702. Although exemplary computer 702 illustrates a hard disk 716, a removable magnetic disk 720, and a removable optical disk 724, it is to be appreciated that other types of electronically accessible media may store instructions that are accessible by an electronic device, such as magnetic cassettes or other magnetic storage devices, flash memory, CD 20 ROM, digital versatile disks (DVD) or other optical storage, RAM, ROM, electrically-erasable programmable read-only memories (EEPROM), and so forth. Such media may also include so-called special purpose or hard-wired integrated circuit (IC) chips. In other words, any electronically-accessible media may be utilized to realize the storage media of the exemplary electronic system and 25 environment 700.

47 Any number of program modules (or other units or sets of instructions) may be stored on hard disk 716, magnetic disk 720, optical disk 724, ROM 712, and/or RAM 710, including by way of general example, an operating system 728, one or more application programs 730, other program modules 732, and program data 734. 5 By way of specific example but not limitation, video renderer 410, graphic interface 412, and device driver interface 414 (all of FIG. 4) may be part of operating system 728. Graphics device driver 422 may be part of program modules 732, optionally with a close linkage and/or integral relationship with operating system 728. Also, an instigating program such as Windows® Media® 9 is an example of an 10 application program 730. Image control and/or graphics data that is currently in system memory may be part of program data 734. A user that is changing ProcAmp or other video settings, for example, may enter commands and/or information into computer 702 via input devices such as a keyboard 736 and a pointing device 738 (e.g., a "mouse"). Other input devices 740 15 (not shown specifically) may include a microphone, joystick, game pad, satellite dish, serial port, scanner, and/or the like. These and other input devices are connected to processing unit 704 via input/output interfaces 742 that are coupled to system bus 708. However, they and/or output devices may instead be connected by other interface and bus structures, such as a parallel port, a game port, a universal 20 serial bus (USB) port, an IEEE 1394 ("Firewire") interface, an IEEE 802.11 wireless interface, a Bluetooth® wireless interface, and so forth. A monitor/view screen 744 (which is an example of display device 436 of FIG. 4) or other type of display device may also be connected to system bus 708 via an interface, such as a video adapter 746. Video adapter 746 (or another 25 component) may be or may include a graphics card (which is an example of graphics device 424) for processing graphics-intensive calculations and for 48 handling demanding display requirements. Typically, a graphics card includes a GPU (such as GPU 426), video RAM (VRAM) (which is an example of video memory 432), etc. to facilitate the expeditious performance of graphics operations. In addition to monitor 744, other output peripheral devices may include components 5 such as speakers (not shown) and a printer 748, which may be connected to computer 702 via input/output interfaces 742. Computer 702 may operate in a networked environment using logical connections to one or more remote computers, such as a remote computing device 750. By way of example, remote computing device 750 may be a personal 10 computer, a portable computer (e.g., laptop computer, tablet computer, PDA, mobile station, etc.), a palm or pocket-sized computer, a gaming device, a server, a router, a network computer, a peer device, other common network node, or another computer type as listed above, and so forth. However, remote computing device 750 is illustrated as a portable computer that may include many or all of the 15 elements and features described herein with respect to computer 702. Logical connections between computer 702 and remote computer 750 are depicted as a local area network (LAN) 752 and a general wide area network (WAN) 754. Such networking environments are commonplace in offices, enterprise-wide computer networks, intranets, the Internet, fixed and mobile 20 telephone networks, other wireless networks, gaming networks, some combination thereof, and so forth. When implemented in a LAN networking environment, computer 702 is usually connected to LAN 752 via a network interface or adapter 756. When implemented in a WAN networking environment, computer 702 typically includes a 25 modem 758 or other means for establishing communications over WAN 754. Modem 758, which may be internal or external to computer 702, may be connected 49 to system bus 708 via input/output interfaces 742 or any other appropriate mechanism(s). It is to be appreciated that the illustrated network connections are exemplary and that other means of establishing communication link(s) between computers 702 and 750 may be employed. 5 In a networked environment, such as that illustrated with electronic device environment 700, program modules or other instructions that are depicted relative to computer 702, or portions thereof, may be fully or partially stored in a remote memory storage device. By way of example, remote application programs 760 reside on a memory component of remote computer 750 but may be usable or 10 otherwise accessible via computer 702. Also, for purposes of illustration, application programs 730 and other electronically-executable instructions such as operating system 728 are illustrated herein as discrete blocks, but it is recognized that such programs, components, and other instructions reside at various times in different storage components of computing device 702 (and/or remote computing 15 device 750) and are executed by data processor(s) 704 of computer 702 (and/or those of remote computing device 750). Although systems, media, methods, protocols, approaches, processes, arrangements, and other implementations have been described in language specific to structural, logical, algorithmic, and functional features and/or diagrams, it is to 20 be understood that the invention defined in the appended claims is not necessarily limited to the specific features or diagrams described. Rather, the specific features and diagrams are disclosed as exemplary forms of implementing the claimed invention.

50 Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that that prior art forms part of the common general knowledge in Australia.

Claims (24)

1. 2. The method as recited in claim 1, wherein the at least a subset of 20 ProcAmp capabilities that the at least one graphics device driver can offer to the video renderer comprises ProcAmp capabilities allotted to the video renderer from the at least one graphics device driver. P:OPER\SPMK12194300 I sp adoc-/3/2009 - 53 3. The method as recited in one of claims 1 and 2, wherein the graphics device driver has one or more predetermined sets of ProcAmp control property capabilities set up for one or more descriptions corresponding to the description of video to be displayed. 5
2. 4. The method as recited in any one of claims 1 to 3, wherein the method further comprises: sending a command to close a video processing stream object to the graphics device driver from the video renderer; 10 receiving the command from the video renderer at the graphics device driver; and closing, by the graphics device driver, the video processing stream object.
3. 5. One or more electronically-accessible media comprising 15 electronically-executable instructions that, when executed, precipitate actions comprising: receiving a query at a graphics device driver from a video renderer, the query comprising: a request for information relating to process amplifier (ProcAmp) control 20 property capabilities; and a description of the type of video to be displayed; generating, based on the description of the video to be displayed, a response that includes the requested information that relates to ProcAmp control property capabilities; P:OPER\SPMI219430 Ist spa.doc413/209 - 54 sending the response to the video renderer from the graphics device driver; providing to the video renderer from the graphics device driver, ProcAmp adjustments that may be performed simultaneously with video processing operations associated with the ProcAmp control properties; 5 selecting, at the video renderer, a ProcAmp control property associated with one of the ProcAmp control property capabilities; receiving at the graphics device driver, from the video renderer, a request for values associated with the selected ProcAmp control property; providing values to the video renderer in response to the request for values 10 associated with the selected ProcAmp control property, the values being used in video processing operations; receiving at the graphics device driver from the video renderer, a command to open a ProcAmp stream object; opening the ProcAmp stream object; 15 sending to the video renderer, from the graphics device driver, another response having a handle pointing to the opened ProcAmp stream object; receiving at the graphics device driver, from the video renderer, a command to perform a ProcAmp adjustment; and causing performance of the ProcAmp adjustment, wherein; 20 the command includes an instruction to perform a video processing operation associated with the selected ProcAmp control property concurrently with the ProcAmp adjustment; F:W)PrW PMA12 I Y43D IA s O0C-5I/3/J09 - 55 causing performance of the ProcAmp adjustment comprises causing a concurrent performance of the ProcAmp adjustment and the video processing operation; and the information relating to ProcAmp control property capabilities is directed 5 to video processing operations that are performed simultaneously with the ProcAmp adjustments.
4. 6. The one or more electronically-accessible media as recited in claim 5, wherein one or more video processing operations performed concurrently with 10 ProcAmp adjustments include at least one video processing operation selected from the group comprising: de-interlacing operations, aspect ratio corrections, color space conversions, frame rate conversions, vertical or horizontal mirroring operations, alpha blending operations, and none. 15 7. The one or more electronically-accessible media as recited in one of claims 5 and 6, wherein the command is directed to a bit block transfer.
5. 8. The one or more electronically-accessible media as recited in claim 7, wherein the command instructs the graphics device driver to cause a bit block 20 transfer to occur along with the performance of the ProcAmp adjustment on the video.
6. 9. The one or more electronically-accessible media as recited in claim 7, wherein the command instructs the graphics device driver to cause a bit block P:\OPERISPM l 2194300 1st pdoc-9/13/2009 - 56 transfer to occur along with the performance of the ProcAmp adjustment to create one image for an entire screen of a display device, the one image stored in memory as a single block and including a frame of the video after the ProcAmp adjustment. 5 10. The one or more electronically-accessible media as recited in any one of claims 5 to 9, wherein the command stipulates at least one control property value or change to a control property value for the ProcAmp adjustment on the video.
7. 11. The one or more electronically-accessible media as recited in any one 10 of claims 5 to 10, comprising the electronically-executable instructions that, when executed, precipitate a further action comprising: receiving at the video renderer an operation request from an instigating application, the operation request including a request to perform a ProcAmp adjustment on the video. 15
8. 12. The one or more electronically-accessible media as recited in any one of claims 5 to 11, comprising the electronically-executable instructions that, when executed, precipitate a further action comprising: issuing a command from the video renderer towards the graphics device 20 driver to close a ProcAmp stream object.
9. 13. The one or more electronically-accessible media as recited in any one of claims 5 to 12, wherein the actions of receiving a query and sending the response are effectuated, at least partially, by propagating the query and the response P:%OPER\SPMI 2194300 Is spadoc4/1/2009 -57 between the video renderer and the graphics device driver using at least one of a graphic interface and a device driver interface.
10. 14. A system for facilitating interaction between a video renderer and a 5 graphics device driver, the system comprising: a processor; video rendering logic adapted to prepare queries that request information relating to process amplifier (ProcAmp) capabilities that can be applied to video to be displayed, wherein the queries include a description of the type of video that is to 10 be displayed; and graphics device driving logic adapted to prepare responses that indicate what ProcAmp capabilities can be applied to video to be displayed based on the description of the type of video to be displayed; and interface logic that is adapted to facilitate interaction between the video 15 rendering logic and the graphics device driving logic, the interaction comprising: receiving a query at a graphics device driver from a video renderer, the query comprising: a request for information relating to process amplifier (ProcAmp) control property capabilities; and the description of the type of video to be displayed; 20 generating, based on the description of the video to be displayed, a response that includes the requested information that relates to ProcAmp control property capabilities; sending the response to the video renderer from the graphics device driver; PAOPER\SPMUl2194300 IIi SPdoc-V13/2009 - 58 providing to the video renderer from the graphics device driver, ProcAmp adjustments that may be performed simultaneously with video processing operations associated with the ProcAmp control properties; selecting, at the video renderer, a ProcAmp control property associated with 5 one of the ProcAmp control property capabilities; receiving at the graphics device driver, from the video renderer, a request for values associated with the selected ProcAmp control property; providing values to the video renderer in response to the request for values associated with the selected ProcAmp control property, the values being used in 10 video processing operations; receiving at the graphics device driver from the video renderer, a command to open a ProcAmp stream object; opening the ProcAmp stream object; sending to the video renderer, from the graphics device driver, another 15 response having a handle pointing to the opened ProcAmp stream object; receiving at the graphics device driver, from the video renderer, a command to perform a ProcAmp adjustment; and causing performance of the ProcAmp adjustment, wherein: the command includes an instruction to perform a video processing operation 20 associated with the selected ProcAmp control property concurrently with the ProcAmp adjustment; causing performance of the ProcAmp adjustment comprises causing a concurrent performance of the ProcAmp adjustment and the video processing operation; and P:OPERUSPMI2194300 1I spdoc-8/132009 -59 the information relating to ProcAmp control property capabilities is directed to video processing operations that are performed simultaneously with the ProcAmp adjustments. 5 15. One or more electronically-accessible storage media storing electronically-executable instructions that, when executed, precipitate actions comprising: transmitting a query from a video renderer to a graphics device driver, wherein the query: 10 is directed to image processing operations that the graphics device driver is capable of providing to the video renderer; and includes a description of video to be displayed; and receiving a response at the video renderer from the graphics device driver, the response indicating at least one image processing operation that the graphics device 15 driver is capable of providing to the video renderer.
11. 16. The one or more electronically-accessible storage media as recited in claim 15, wherein the graphics device driver is capable of providing the at least one image processing operation to the video renderer via associated graphics hardware. 20
12. 17. The one or more electronically-accessible storage media as recited in one of claims 15 and 16, wherein the video renderer transmits another query to the graphics device driver, the another query requesting for the at least one image processing operation, parameters associated with: P:Y PtK\PM~J21940U Ist spa dOC-EIl1/2W9 - 60 a minimum value; a maximum value; an incremental step size value; and a default value. 5
13. 18. The one or more electronically-accessible storage media as recited in any one of claims 15 to 17, wherein the video renderer further queries the graphics device driver for a list of devices supported by the graphics device driver. 10 19. The one or more electronically-accessible storage media as recited in any one of claims 15 to 18, storing the electronically-executable instructions that, when executed, precipitate a further action comprising tailoring, at the graphics device driver, the image processing operations based on the description of video to be displayed. 15
14. 20. The one or more electronically-accessible storage media as recited in claim 19, wherein the tailoring adjusts the image processing operations in order to support the particular type of video stream associated with the description of video to be displayed. 20
15. 21. The one or more electronically-accessible storage media as recited in any one of claims 15 to 20, storing the electronically-executable instructions that, when executed, precipitate further actions comprising: PAOPER\SPM121943(IO s1 spadoc-8/13/2009 -61 transmitting another query from the video renderer to the graphics device driver, the another query directed to property capabilities for the at least one image processing operation that the graphics device driver is capable of providing to the video renderer; and 5 receiving another response at the video renderer from the graphics device driver, the another response indicating at least one property capability for the at least one image processing operation that the graphics device driver is capable of providing to the video renderer. 10 22. The one or more electronically-accessible storage media as recited in any one of claims 15 to 21, storing the electronically-executable instructions that, when executed, precipitate further actions comprising: transmitting another query from the video renderer to the graphics device driver, the another query directed to simultaneous image processing operational abilities 15 with respect to the at least one image processing operation that the graphics device driver is capable of providing to the video renderer; and receiving another response at the video renderer from the graphics device driver, the another response indicating at least one simultaneous image processing operational ability with respect to the at least one image processing operation that the 20 graphics device driver is capable of providing to the video renderer.
16. 23. The one or more electronically-accessible storage media as recited in any one of claims 15 to 22, storing the electronically-executable instructions that, when executed, precipitate further actions comprising: -62 transmitting another query from the video renderer to the graphics device driver, the another query directed to property values for the at least one image processing operation that the graphics device driver is capable of providing to the video renderer; and 5 receiving another response at the video renderer from the graphics device driver, the another response indicating at least one property value for the at least one image processing operation that the graphics device driver is capable of providing to the video renderer. 10 24. A computing device comprising: a processor; a graphics device coupled to the processor; a computer-readable storage media, coupled to the processor, storing program modules executable by the processor, the program modules comprising: 15 a video renderer, the video renderer configured to send a query to a graphics device driver, the query being directed to image processing operations that the graphics device driver is capable of providing, wherein the query includes a description of video to be displayed; and the graphics device driver to send, to the video renderer, a response to the 20 query, the response indicating at least one image processing operation that the graphics device driver is capable of providing to the video renderer, the image processing operations including one or more video processing operations and one or more Process Amplifier (ProcAmp) adjustments. r ~urrt.mrMu Iffl gvau spa .aocsJ aXuu - 63 25. The computing device as recited by claim 24, wherein the one or more video processing operations and the one or more ProcAmp adjustments are to be performed simultaneously 5 26. The computing device as recited by any one of claims 24 and 25, wherein the graphics device driver is configured to: receive a command from the video renderer to perform an image processing operation; and cause the image processing operation to be performed by the graphics device. 10
17. 27. A method facilitating interaction between a video renderer and a graphics device driver, the method comprising: sending a query regarding available process amplifier (ProcAmp) operations to the graphics device driver from the video renderer, wherein the query includes a 15 description of video to be displayed; tailoring, at the graphics device driver, the ProcAmp operations of the graphics device driver based on the description of video to be displayed; and transmitting a response with the tailored ProcAmp operations to the video renderer from the graphics device driver. 20
18. 28. The method as recited in claim 27, wherein the response by the graphics device driver includes video processing operations that are performed simultaneously with the ProcAmp operations. - 64 29. The method as recited in any one of claims 27 and 28, wherein the method further comprises: creating an instance of a ProcAmp control device; and calling one or more adjustments associated with the tailored ProcAmp 5 operations, the one or more adjustments being performed on input data associated with the description of video to be displayed
19. 30. The method as recited in any one of claims 27 to 29, wherein the method further comprises: 10 sending a command to open a video processing stream object to the graphics device driver from the video renderer; receiving the command from the video renderer at the graphics device driver; transmitting a response with a handle to an opened video processing stream object to the video renderer from the graphics device driver; and 15 accepting the response with the handle from the graphics device driver at the video renderer.
20. 31. The method as recited in any one of claims 27 to 30, wherein the sending further comprises: 20 calling a rendering function directed toward at least one of the one or more ProcAmp operations; and responsive to the calling, identifying the one or more ProcAmp operations available by passing one or more input data parameters associated with the description of video to the graphics device driver. - 65 32. The method as recited in claim 31, wherein the method further comprises; rendering the one or more input data parameters in accordance with the one or 5 more ProcAmp operations; and outputting one or more adjusted values to a destination surface.
21. 33. One or more electronically-accessible storage media storing electronically-executable instructions that, when executed, direct an electronic 10 apparatus to perform the method as recited any one of claims 27 to 32.
22. 34. Electronically-accessible media substantially as hereinbefore described with reference to the accompanying drawings. 15 35. A method substantially as hereinbefore described with reference to the accompanying drawings.
23. 36. A system substantially as hereinbefore described with reference to the accompanying drawings. 20
24. 37. A computing device substantially as hereinbefore described with reference to the accompanying drawings.